Preheat oven to 350°F and line an 8×8-inch baking pan with parchment paper.
Peel and boil sweet potato until tender.
In a medium bowl, whisk together sweet potato, eggs, maple syrup, and almond butter until smooth.
In a separate bowl, combine cocoa powder, BetterDays protein powder, and baking soda.
Add dry ingredients to the wet mixture and stir until a thick, smooth batter forms.
Fold in Lily’s chocolate chips, reserving a few to sprinkle on top.
Spread evenly into the prepared pan and bake for 25 minutes, until edges are set and the center looks just slightly under-baked.
Top with flaky sea salt.
Let cool completely before slicing. For an extra-fudgy texture, chill for 30 minutes before cutting.